Display device, electronic device including the same, and method of manufacturing the same

The present application claims priority to and the benefit of Korean Patent Application No. 10-2024-0087526, filed on Jul. 3, 2024, in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference.

Aspects of some embodiments of the present disclosure generally relate to a display device, an electronic device, and a method of manufacturing the same.

With the development of information technologies, the importance of a display device which provide a connection medium between users and information has increased. Accordingly, display devices such as liquid crystal display devices and organic light emitting display devices are increasingly being used.

A photo sensor, a pixel, and the like may be located in a display device. The display device may control a function of the display device (e.g., adjust a luminance of an image displayed in the display device) or provide a biometric authentication function (e.g., a fingerprint authentication function), based on an amount of light incident through the photo sensor.

Meanwhile, as the size of each of the photo sensor and the pixel becomes smaller, a technique for efficiently arranging a power line which supplies power to the photo sensor and the pixel has been studied.

The above information disclosed in this Background section is only for enhancement of understanding of the background and therefore the information discussed in this Background section does not necessarily constitute prior art.

Aspects of some embodiments include a display device, an electronic device, and a method of manufacturing the same, in which a power line can be relatively efficiently arranged.

According to some embodiments of the present disclosure, a display device includes: a first pixel; a first photo sensor located adjacent to the first pixel in a first direction, the first photo sensor including a photo sensor circuit; a second pixel located adjacent to the first pixel in a second direction, wherein the second direction is different from the first direction; a second photo sensor located adjacent to the second pixel in the first direction, the second photo sensor including a photo sensor circuit; a power line entirely extending in the first direction, the power line having a reset voltage applied thereto, the power line being directly connected to the photo sensor circuit of the second photo sensor; a power line connection electrode in an island shape, the power line connection electrode being directly connected to the photo sensor circuit of the first photo sensor; and a power line extension electrode connected to the power line, the power line extension electrode entirely extending in the second direction, the power line extension electrode being directly connected to the power line connection electrode.

According to some embodiments, the power line may be a sixth power line. According to some embodiments, each of the first photo sensor and the second photo sensor may include a light receiving element. According to some embodiments, each of the photo sensor circuit of the first photo sensor and the photo sensor circuit of the second photo sensor may include: a first sensor transistor including a gate electrode connected to the light receiving element at a sixth node, and the first sensor transistor being connected to a fourth power line; a second sensor transistor connected between the first sensor transistor and a sensing line; and a third sensor transistor including a gate electrode connected to a reset control line, the third sensor transistor being connected between the sixth node and the sixth power line. According to some embodiments, the light receiving element may be connected to the sixth node and a second power line.

According to some embodiments, the sixth power line may include a first source drain electrode connected to a semiconductor layer of the third sensor transistor.

According to some embodiments, at least a portion of the sixth node may be configured with the first source drain electrode.

According to some embodiments, the power line extension electrode may be configured with a second source drain electrode. According to some embodiments, the second source drain electrode may be located on the first source drain electrode.

According to some embodiments, at least a portion of the sixth node may be configured with the second source drain electrode.

According to some embodiments, the sensing line may include a third source drain electrode. According to some embodiments, the third source drain electrode may be located on the second source drain electrode.

According to some embodiments, the sensing line may include a connection electrode configured with the first source drain electrode, a connection electrode configured with the second source drain electrode, and a connection electrode configured with the third source drain electrode.

According to some embodiments, the connection electrode configured with the first source drain electrode and the connection electrode configured with the second source drain electrode in the sensing line may be located inside each of the photo sensor circuit of the first photo sensor and the photo sensor circuit of the second photo sensor.

According to some embodiments, the connection electrode configured with the third source drain electrode in the sensing line may be located between the photo sensor circuit of the first photo sensor and the photo sensor circuit of the second photo sensor.

According to some embodiments, each of the first pixel and the second pixel may include a pixel circuit and a light emitting element connected to the pixel circuit. According to some embodiments, the pixel circuit may include: a first pixel transistor connected between a first node and a second node, the first pixel transistor including a gate electrode connected to a fourth node; a second pixel transistor configured to switch an electrical connection between the first node and a data line in response to a first scan signal applied to a first scan line; a third pixel transistor connected between the second node and the fourth node; a fourth pixel transistor connected between the fourth node and a third power line; a fifth pixel transistor connected between a first power line and the first node; a sixth pixel transistor connected between the second node and a fifth node; a seventh pixel transistor connected between the fifth node and the fourth power line; an eighth pixel transistor connected between a fifth power line and the first node; a first capacitor including one electrode connected to the fourth node and the other electrode connected to the first power line; and a second capacitor including one electrode connected to the fourth node and the other electrode connected to the first scan line. According to some embodiments, the light emitting element may be connected between the fifth node and the second power line.

According to some embodiments, each of the first, second, and fifth to eighth pixel transistors and the first and second sensor transistors may include a first semiconductor layer.

According to some embodiments, each of the third and fourth pixel transistors and the third sensor transistor may include a second semiconductor layer. According to some embodiments, the second semiconductor layer may be located on the first semiconductor layer.

According to some embodiments, the first pixel and the first photo sensor may be located on a first pixel row, and the second pixel and the second photo sensor may be located on a second pixel row. According to some embodiments, the first pixel and the second pixel may be located on a first pixel column, and the first photo sensor and the second photo sensor may be located on a sensor column.

According to some embodiments of the present disclosure, there is provided an electronic device comprising the display device, wherein the electronic device is one of a mobile phone, a personal digital assistant (PDA), a smartphone, a wireless modulator-demodulator (MODEM), or a notebook computer.

According to some embodiments of the present disclosure, there is provided a method of manufacturing a display device including a first photo sensor on a first pixel row and a second photo sensor on a second pixel row, the method including: forming a first semiconductor layer on a substrate, wherein the first semiconductor layer constitutes a semiconductor layer of each of a first sensor transistor and a second sensor transistor of each of the first photo sensor and the second photo sensor; forming a first gate electrode layer on the first semiconductor layer, wherein the first gate electrode layer constitutes a gate electrode of each of the first sensor transistor and the second sensor transistor; forming a second semiconductor layer on the first gate electrode layer, wherein the second semiconductor layer constitutes a semiconductor layer of a third sensor transistor of each of the first photo sensor and the second photo sensor; forming a second gate electrode layer on the second semiconductor layer, wherein the second gate electrode layer constitutes a gate electrode of the third sensor transistor; forming a first source drain electrode on the second gate electrode layer, wherein the first source drain electrode includes a power line which extends in a first direction on the second pixel row and is connected to the second semiconductor layer and a power line connection electrode which is located on the first pixel row and is connected to the second semiconductor layer; and forming a second source drain electrode on the first source drain electrode, wherein the second source drain electrode includes a power line extension electrode extending in a second direction different from the first direction, the power line extension electrode being connected to the power line and the power line connection electrode.

According to some embodiments, the first semiconductor layer may include a silicon semiconductor.

According to some embodiments, the second semiconductor layer may include an oxide semiconductor.

According to some embodiments, the method may further include forming a third source drain electrode on the second source drain electrode. According to some embodiments, the third source drain electrode may extend in the first direction, and be connected to the power line extension electrode.

According to some embodiments, the first photo sensor and the second photo sensor may be commonly connected to one sensing line. According to some embodiments, the sensing line may be configured with the first source drain electrode, the second source drain electrode, and the third source drain electrode.

According to some embodiments, the first source drain electrode and the second source drain electrode may be located inside each of the first photo sensor and the second photo sensor. According to some embodiments, the third source drain electrode may connect the first photo sensor and the second photo sensor to each other.

Hereinafter, aspects of some embodiments are described in more detail with reference to the accompanying drawings so that those skilled in the art may easily practice the present disclosure. Embodiments according to the present disclosure may be implemented in various different forms and is not limited to the disclosed embodiments described in the present specification.

Description of some parts or components that may not be necessary to enable a person having ordinary skill in the art to make, use, or understand embodiments according to the present disclosure may be omitted to more clearly describe aspects of some embodiments of the present disclosure, and the same or similar constituent elements will be designated by the same reference numerals throughout the specification. Therefore, the same reference numerals may be used in different drawings to identify the same or similar elements.

In addition, the size and thickness of each component illustrated in the drawings are arbitrarily shown for better understanding and ease of description, but the present disclosure is not limited thereto. Thicknesses of several portions and regions are exaggerated for clear expressions.

In description, the expression “equal” may mean “substantially equal.” That is, this may mean equality to a degree to which those skilled in the art can understand the equality. Other expressions may be expressions in which “substantially” is omitted.

It will be understood that, although the terms “first”, “second,” etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. Thus, a “first” element discussed below could also be termed a “second” element without departing from the teachings of the present disclosure. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise.

The terms “under,” “beneath,” “on,” “above,” and the like are used to describe a relationship between components illustrated in a drawing. The terms are relative and are described with reference to a direction indicated in the drawing.

Unless defined otherwise, it is to be understood that all the terms (including technical and scientific terms) used in the specification has the same meaning as those that are understood by those who skilled in the art. Further, the terms defined by the dictionary generally used should not be ideally or excessively formally defined unless clearly defined specifically.

It will be further understood that the terms “includes” and/or “including”, when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence and/or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Hereinafter, aspects of some embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings.

is a schematic system diagram of an electronic deviceaccording to some embodiments of the present disclosure.

Referring to, the electronic deviceaccording to some embodiments of the present disclosure may include a display device, a processor, a memory, and the like.

The display devicemay visually provide or display information to the outside (e.g., a user) of the electronic device. The display devicemay include, for example, a display panel, a driving circuit, and the like. The display deviceaccording to some embodiments of the present disclosure may include a touch sensor adapted to sense a touch and/or a pressure sensor adapted to measure an intensity of a force incurred by the touch.

The processormay control at least another component (e.g., a hardware or software component) of the electronic device, which is connected to the processor, by executing software (e.g., a program), and perform various data processing or calculations. According to some embodiments of the present disclosure, as at least a portion of the data processing or calculations, the processormay store, in a volatile memory, data received from another component (e.g., the display device), process commands or data, stored in the volatile memory, and store result data in a non-volatile memory. According to some embodiments of the present disclosure, the processormay include a main processor(e.g., a central processing unit or an application processor) or a co-processor(e.g., a graphic processing unit (GPU), a neural processing unit (NPU), an image signal processor, a sensor hub processor, a communication processor, or the like) which can operate independently from the main processoror together with the main processor. For example, the electronic deviceincludes the main processorand the co-processor, the co-processormay be adapted to use low power as compared with the main processoror to be specialized in a designated function. The co-processormay be implemented separately from the main processoror as a portion of the main processor.

The co-processormay control, for example, at least some of functions or states related to at least one component (e.g., the display device) among components of the electronic device, instead of the main processorwhile the main processoris in an inactive (e.g., sleep) state or together with the main processorwhile the main processoris in an active (e.g., application execution) state. According to some embodiments of the present disclosure, the co-processor(e.g., an image signal processor or a communication processor) may be implemented as a portion of another component (e.g., a camera module, a communication module, or the like) functionally related to the co-processor. According to some embodiments of the present disclosure, the co-processor(e.g., a neural processing unit) may include a hardware structure specialized in processing of an artificial intelligence model. The artificial intelligence model may be generated through machine learning.

The memorymay store various data used by at least one component (e.g., the processor) of the electronic device. The data may include, for example, software (e.g., the program) and input data or output data for a command related to the software. The memorymay include the volatile memoryor the non-volatile memory. The non-volatile memorymay include an internal memory. The non-volatile memorymay further include an external memory.

The programmay be stored as software in the memory, and include, for example, an application, a middleware, an operating system, and the like.

The electronic deviceaccording to some embodiments of the present disclosure may be designated as a mobile station, a mobile equipment (ME), a user equipment (UE), a user terminal (UT), a subscriber station (SS), a wireless device, a handheld device, an access terminal (AT), or the like. The electronic deviceaccording to some embodiments of the present disclosure may be, for example, a device having a communication function, such as a mobile phone, a personal digital assistant (PDA), a smartphone, a wireless modulator-demodulator (MODEM), or a notebook computer.

The electronic deviceaccording to some embodiments of the present disclosure may include a power management module configured to manage power supplied to the electronic device. The power management module may be implemented as, for example, at least a portion of a power management integrated circuit (PMIC).

At least some of the components of the electronic deviceaccording to some embodiments of the present disclosure may be connected to each other and exchange signals (e.g., commands, data or the like) therebetween through an inter-peripheral communication scheme (e.g., a bus, a general purpose input and output (GPIO), a serial peripheral interface (SPI), a mobile industry processor interface (MIPI), or the like).

is a diagram illustrating a display deviceand a processoraccording to some embodiments of the present disclosure.

Referring to, the display deviceaccording to some embodiments of the present disclosure may include a display paneland a driving circuit.

The display panelmay include a display area AA in which at least one pixel PXL is located and a non-display area NA located in a peripheral area (e.g., an edge area, surrounding, in a periphery, or outside a footprint) of the display area AA. The at least one pixel PXL may be located in the display area AA. At least one photo sensor PHS may be located in the display area AA.